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US production of primary aluminum peaked in 1980 at 4.64 million metric tons. Since then, US primary aluminum production has fallen by more than half, but secondary production has increased, making up much of the difference. In the 1950s and 1960s, primary production made up about 80% of the aluminum output.
Aluminium is found on Earth primarily in rocks in the crust, where it is the third-most abundant element, after oxygen and silicon, rather than in the mantle, and virtually never as the free metal. It is obtained industrially by mining bauxite , a sedimentary rock rich in aluminium minerals.
This is a list of countries by primary aluminium production in 2023. [1] Primary aluminium is produced from aluminium oxide which is obtained from bauxite and excludes recycled aluminium. Only countries with a minimum production of 100,000 tonnes are listed.
Most of the aluminum on Earth is located in the mantle and crust of the lithosphere. [3] From various processes, this aluminum is uplifted through the soil and into the biotic cycle. Most notably, humans find mineral deposits of aluminum in the earth and dig it up to use in various products.
In 2000, the U.S. was the largest producer of primary aluminum. The six remaining smelters in the U.S. now make up a small percentage of global capacity.
Prior to the invention of this process, and prior to the Deville process, aluminium ore was refined by heating ore along with elemental sodium or potassium in a vacuum. The method was complicated and consumed materials that were themselves expensive at that time. This made early elemental aluminium more expensive than gold. [13]
Aluminum can prices vary by region and are based on weight. The average recycling value per pound of cans in the U.S. is currently $0.56. How many aluminum cans are in a pound?
In geology, sial is an antiquated [1] blended term for the composition of the upper layer of Earth's crust, namely rocks rich in aluminium silicate minerals. It is sometimes equated with the continental crust because it is absent in the wide oceanic basins, [2] but 'sial' is a geochemical term rather than a plate tectonic term. [3]